Heat recovery ventilation - Revision history

Designing Buildings at 08:43, 1 November 2020

2020-11-01T08:43:21Z

← Older revision		Revision as of 08:43, 1 November 2020
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	* [http://www.bbc.co.uk/news/business-12137680 Harvesting energy: body heat to warm buildings]		* [http://www.bbc.co.uk/news/business-12137680 Harvesting energy: body heat to warm buildings]

−	[[Category:Articles_needing_more_work]] [[Category:~~Products_/_components~~]] [[Category:DCN_Product_Knowledge]]	+	[[Category:Articles_needing_more_work]] [[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Products_/_components]]

Designing Buildings at 11:33, 16 June 2020

2020-06-16T11:33:13Z

← Older revision		Revision as of 11:33, 16 June 2020
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−	~~To help develop this article, click 'Edit this article' above.~~
−
−	~~-----~~
	Ventilation is necessary in buildings to remove ‘stale’ internal air and replace it with ‘fresh’ outside air. This helps to:		Ventilation is necessary in buildings to remove ‘stale’ internal air and replace it with ‘fresh’ outside air. This helps to:

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	It is also possible, although relatively complicated to include heat recovery in natural ventilation systems.		It is also possible, although relatively complicated to include heat recovery in natural ventilation systems.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki. =
−		+
−	=== Related articles on Designing Buildings Wiki. ===	+

	* Air conditioning.		* Air conditioning.
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	* Variable refrigerant flow.		* Variable refrigerant flow.

−	=== External references ===	+	= External references =

	* [http://www.carbontrust.com/media/31715/ctg057_heat_recovery.pdf Heat recovery: A guide to key systems and applications].		* [http://www.carbontrust.com/media/31715/ctg057_heat_recovery.pdf Heat recovery: A guide to key systems and applications].
−	* ~~[http://www.carbontrust.com/media/147119/j7948_ctl030_how_to_implement_hvac_heat_recovery_aw.pdf~~ How to implement heat recovery in heating, air conditioning and ventilation systems.]	+	* Carbon Trust, How to implement heat recovery in heating, air conditioning and ventilation systems.
	* [https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/190149/16_04-DECC-The_Future_of_Heating_Accessible-10.pdf The Future of Heating: Meeting the Challenge].		* [https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/190149/16_04-DECC-The_Future_of_Heating_Accessible-10.pdf The Future of Heating: Meeting the Challenge].
	* [https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/294900/element_energy_et_al_potential_for_recovering_and_using_surplus_heat_from_industry.pdf The potential for recovering and using surplus heat from industry].		* [https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/294900/element_energy_et_al_potential_for_recovering_and_using_surplus_heat_from_industry.pdf The potential for recovering and using surplus heat from industry].
	* [http://www.bbc.co.uk/news/business-12137680 Harvesting energy: body heat to warm buildings]		* [http://www.bbc.co.uk/news/business-12137680 Harvesting energy: body heat to warm buildings]

−	[[Category:Articles_needing_more_work]] [[Category:Products_/_components]]	+	[[Category:Articles_needing_more_work]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

212.67.99.78 at 15:14, 19 January 2016

2016-01-19T15:14:25Z

← Older revision		Revision as of 15:14, 19 January 2016
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−
	To help develop this article, click 'Edit this article' above.		To help develop this article, click 'Edit this article' above.

−	----	+	-----
−		+
	Ventilation is necessary in buildings to remove ‘stale’ internal air and replace it with ‘fresh’ outside air. This helps to:		Ventilation is necessary in buildings to remove ‘stale’ internal air and replace it with ‘fresh’ outside air. This helps to:
−	*Moderate internal temperatures.	+
−	*Reduce the accumulation of moisture, odours and other gases that can build up during occupied periods.	+	* Moderate internal temperatures.
−	*Create air movement which improves the comfort of occupants.	+	* Reduce the accumulation of moisture, odours and other gases that can build up during occupied periods.
		+	* Create air movement which improves the comfort of occupants.

	Very broadly, ventilation can be ‘natural’ or ‘mechanical’.		Very broadly, ventilation can be ‘natural’ or ‘mechanical’.
−	*Mechanical (or ‘forced’) ventilation tends to be driven by fans.	+
−	*Natural ventilation is driven by ‘natural’ pressure differences from one part of the building to another.	+	* Mechanical (or ‘forced’) ventilation tends to be driven by fans.
		+	* Natural ventilation is driven by ‘natural’ pressure differences from one part of the building to another.

	Ventilation systems may also include heating, cooling, filtration and humidity control.		Ventilation systems may also include heating, cooling, filtration and humidity control.
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	=== Related articles on Designing Buildings Wiki. ===		=== Related articles on Designing Buildings Wiki. ===
−	*Air conditioning.	+
−	*Air handling unit.	+	* Air conditioning.
−	*Chiller unit.	+	* Air handling unit.
−	*District energy.	+	* Chiller unit.
−	*Geothermal pile foundations.	+	* District energy.
−	*Heat pump.	+	* Geothermal pile foundations.
−	*Heat recovery.	+	* Heat pump.
−	*HVAC.	+	* Heat recovery.
−	*Mechanical ventilation.	+	* HVAC.
−	*Thermal labyrinths.	+	* Mechanical ventilation.
−	*Variable refrigerant flow.	+	* Thermal labyrinths.
		+	* Variable refrigerant flow.

	=== External references ===		=== External references ===
−	*[http://www.carbontrust.com/media/31715/ctg057_heat_recovery.pdf Heat recovery: A guide to key systems and applications].
−	*[http://www.carbontrust.com/media/147119/j7948_ctl030_how_to_implement_hvac_heat_recovery_aw.pdf How to implement heat recovery in heating, air conditioning and ventilation systems.]
−	*[https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/190149/16_04-DECC-The_Future_of_Heating_Accessible-10.pdf The Future of Heating: Meeting the Challenge].
−	*[https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/294900/element_energy_et_al_potential_for_recovering_and_using_surplus_heat_from_industry.pdf The potential for recovering and using surplus heat from industry].

−	[[Category:Articles_needing_more_work]]	+	* [http://www.carbontrust.com/media/31715/ctg057_heat_recovery.pdf Heat recovery: A guide to key systems and applications].
−	[[Category:Products_/_components]]	+	* [http://www.carbontrust.com/media/147119/j7948_ctl030_how_to_implement_hvac_heat_recovery_aw.pdf How to implement heat recovery in heating, air conditioning and ventilation systems.]
		+	* [https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/190149/16_04-DECC-The_Future_of_Heating_Accessible-10.pdf The Future of Heating: Meeting the Challenge].
		+	* [https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/294900/element_energy_et_al_potential_for_recovering_and_using_surplus_heat_from_industry.pdf The potential for recovering and using surplus heat from industry].
		+	* [http://www.bbc.co.uk/news/business-12137680 Harvesting energy: body heat to warm buildings]
		+
		+	[[Category:Articles_needing_more_work]] [[Category:Products_/_components]]

Designing Buildings at 10:32, 21 October 2014

2014-10-21T10:32:27Z

Designing Buildings at 10:23, 21 October 2014

2014-10-21T10:23:15Z

← Older revision		Revision as of 10:23, 21 October 2014
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		+	To help develop this article, click 'Edit this article' above.

−	~~Ventilation is necessary in buildings to remove ‘stale’ air and replace it with ‘fresh’ air.~~	+	----

−	This helps to:	+	Ventilation is necessary in buildings to remove ‘stale’ air and replace it with ‘fresh’ air. This helps to:
	*Moderate internal temperatures.		*Moderate internal temperatures.
	*Reduce the accumulation of moisture, odours and other gases that can build up during occupied periods.		*Reduce the accumulation of moisture, odours and other gases that can build up during occupied periods.
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	Ventilation systems may also include heating, cooling, filtration and humidity control.		Ventilation systems may also include heating, cooling, filtration and humidity control.

−	Ventilation has become increasingly important ~~with~~ the tendency to ‘seal’ modern buildings. However the process of extracting air which may have been conditioned, and replacing it with air that has not is inherently wasteful.	+	Ventilation has become increasingly important because of the tendency to ‘seal’ modern buildings. However the process of extracting air which may have been conditioned, and replacing it with air that has not is inherently wasteful.

−	This can be mitigated by heat recovery is the process of collecting and re-using heat that ~~is generated from any process where the heat~~ would otherwise be lost ~~(ref [http://www.carbontrust.com/media/31715/ctg057_heat_recovery.pdf The Carbon Trust, 2011]). This can help~~ reduce energy consumption, reducing running costs and carbon emissions.	+	This can be mitigated by heat recovery, the process of collecting and re-using heat that would otherwise be lost to reduce energy consumption, reducing running costs and carbon emissions.

−	Heat recovery ventilation (HRV or ventilation heat recovery (VHR) or Mechanical Ventilation with Heat Recovery (MVHR)) uses a heat exchanger recover heat from extract air, that would otherwise be rejected to the outside, and uses it to pre-heat the ‘fresh’ supply air. Very efficient heat exchangers can recover as much as 98% of the ‘waste’ heat.	+	Heat recovery ventilation (HRV or ventilation heat recovery (VHR) or Mechanical Ventilation with Heat Recovery (MVHR)) uses a heat exchanger to recover heat from extract air, that would otherwise be rejected to the outside, and uses it to pre-heat the ‘fresh’ supply air. Very efficient heat exchangers can recover as much as 98% of the ‘waste’ heat.

−	Typically heat recovery ventilation works by transferring heat between the incoming and outgoing air by ~~driving~~ them in opposite directions ~~through~~ flat plates ~~or fins~~ in an air-to-air heat ~~exchanger~~. Heat is absorbed on one side and released on the other. Cellular heat exchangers, which can achieve greater efficiency, drive the incoming and outgoing heat through adjacent square tubes, increasing the heat transfer surface area.	+	Typically heat recovery ventilation works by transferring heat between the incoming and outgoing air streams by blowing them in opposite directions between adjacent flat plates in air-to-air heat exchangers. Heat is absorbed by the plates from the 'hot' air on one side and released to the 'cold' air on the other. Cellular heat exchangers, which can achieve greater efficiency, drive the incoming and outgoing heat through adjacent square tubes, increasing the heat transfer surface area.

−	Air to ground and air to water heat exchangers ~~can also be used which~~ use the earth or water as a heat exchange body by blowing air through tubes surrounded by earth or water.	+	Air to ground and air to water heat exchangers use the earth or water as a heat exchange body by blowing air through tubes surrounded by earth or water.

	Heat can also be recovered from other processes and components, such as refrigeration units and chiller units, boilers, power generation plant, plant cooling systems, hot liquid effluents and high-temperature exhaust gasses. Recovered heat can also be used for drying processes, power generation, pre-heating combustion air for furnaces, boilers and so on.		Heat can also be recovered from other processes and components, such as refrigeration units and chiller units, boilers, power generation plant, plant cooling systems, hot liquid effluents and high-temperature exhaust gasses. Recovered heat can also be used for drying processes, power generation, pre-heating combustion air for furnaces, boilers and so on.
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	Heat recovery is also possible with heat pumps, which essentially reverse the refrigeration cycle of chiller units to providing heating, rather than cooling.		Heat recovery is also possible with heat pumps, which essentially reverse the refrigeration cycle of chiller units to providing heating, rather than cooling.

−	It is possible, although relatively complicated to include heat recovery in natural ventilation systems.	+	It is also possible, although relatively complicated to include heat recovery in natural ventilation systems.

	= Find out more =		= Find out more =
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	*[https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/294900/element_energy_et_al_potential_for_recovering_and_using_surplus_heat_from_industry.pdf The potential for recovering and using surplus heat from industry].		*[https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/294900/element_energy_et_al_potential_for_recovering_and_using_surplus_heat_from_industry.pdf The potential for recovering and using surplus heat from industry].

		+	[[Category:Articles_needing_more_work]]
	[[Category:Products_/_components]]		[[Category:Products_/_components]]

Designing Buildings: Created page with " Ventilation is necessary in buildings to remove ‘stale’ air and replace it with ‘fresh’ air. This helps to: Moderate internal temperatures. Reduce the accumulation o..."

2014-10-21T10:17:18Z

Created page with " Ventilation is necessary in buildings to remove ‘stale’ air and replace it with ‘fresh’ air. This helps to: *Moderate internal temperatures. *Reduce the accumulation o..."

New page

Ventilation is necessary in buildings to remove ‘stale’ air and replace it with ‘fresh’ air.

This helps to:
*Moderate internal temperatures.
*Reduce the accumulation of moisture, odours and other gases that can build up during occupied periods.
*Create air movement which improves the comfort of occupants.

Very broadly, ventilation in buildings can be classified as ‘natural’ or ‘mechanical’.
*Mechanical (or ‘forced’) ventilation tends to be driven by fans.
*Natural ventilation is driven by ‘natural’ pressure differences from one part of the building to another.

Ventilation systems may also include heating, cooling, filtration and humidity control.

Ventilation has become increasingly important with the tendency to ‘seal’ modern buildings. However the process of extracting air which may have been conditioned, and replacing it with air that has not is inherently wasteful.

This can be mitigated by heat recovery is the process of collecting and re-using heat that is generated from any process where the heat would otherwise be lost (ref [http://www.carbontrust.com/media/31715/ctg057_heat_recovery.pdf The Carbon Trust, 2011]). This can help reduce energy consumption, reducing running costs and carbon emissions.

Heat recovery ventilation (HRV or ventilation heat recovery (VHR) or Mechanical Ventilation with Heat Recovery (MVHR)) uses a heat exchanger recover heat from extract air, that would otherwise be rejected to the outside, and uses it to pre-heat the ‘fresh’ supply air. Very efficient heat exchangers can recover as much as 98% of the ‘waste’ heat.

Typically heat recovery ventilation works by transferring heat between the incoming and outgoing air by driving them in opposite directions through flat plates or fins in an air-to-air heat exchanger. Heat is absorbed on one side and released on the other. Cellular heat exchangers, which can achieve greater efficiency, drive the incoming and outgoing heat through adjacent square tubes, increasing the heat transfer surface area.

Air to ground and air to water heat exchangers can also be used which use the earth or water as a heat exchange body by blowing air through tubes surrounded by earth or water.

Heat can also be recovered from other processes and components, such as refrigeration units and chiller units, boilers, power generation plant, plant cooling systems, hot liquid effluents and high-temperature exhaust gasses. Recovered heat can also be used for drying processes, power generation, pre-heating combustion air for furnaces, boilers and so on.

Heat recovery is also possible with heat pumps, which essentially reverse the refrigeration cycle of chiller units to providing heating, rather than cooling.

It is possible, although relatively complicated to include heat recovery in natural ventilation systems.

= Find out more =

=== Related articles on Designing Buildings Wiki. ===
*Air conditioning.
*Air handling unit.
*Chiller unit.
*District energy.
*Geothermal pile foundations.
*Heat pump.
*Heat recovery.
*HVAC.
*Mechanical ventilation.
*Thermal labyrinths.
*Variable refrigerant flow.

=== External references ===
*[http://www.carbontrust.com/media/31715/ctg057_heat_recovery.pdf Heat recovery: A guide to key systems and applications].
*[http://www.carbontrust.com/media/147119/j7948_ctl030_how_to_implement_hvac_heat_recovery_aw.pdf How to implement heat recovery in heating, air conditioning and ventilation systems.]
*[https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/190149/16_04-DECC-The_Future_of_Heating_Accessible-10.pdf The Future of Heating: Meeting the Challenge].
*[https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/294900/element_energy_et_al_potential_for_recovering_and_using_surplus_heat_from_industry.pdf The potential for recovering and using surplus heat from industry].

[[Category:Products_/_components]]

← Older revision		Revision as of 10:32, 21 October 2014
Line 4:		Line 4:
	----		----

−	Ventilation is necessary in buildings to remove ‘stale’ air and replace it with ‘fresh’ air. This helps to:	+	Ventilation is necessary in buildings to remove ‘stale’ internal air and replace it with ‘fresh’ outside air. This helps to:
	*Moderate internal temperatures.		*Moderate internal temperatures.
	*Reduce the accumulation of moisture, odours and other gases that can build up during occupied periods.		*Reduce the accumulation of moisture, odours and other gases that can build up during occupied periods.
	*Create air movement which improves the comfort of occupants.		*Create air movement which improves the comfort of occupants.

−	Very broadly, ventilation ~~in buildings~~ can be ~~classified as~~ ‘natural’ or ‘mechanical’.	+	Very broadly, ventilation can be ‘natural’ or ‘mechanical’.
	*Mechanical (or ‘forced’) ventilation tends to be driven by fans.		*Mechanical (or ‘forced’) ventilation tends to be driven by fans.
	*Natural ventilation is driven by ‘natural’ pressure differences from one part of the building to another.		*Natural ventilation is driven by ‘natural’ pressure differences from one part of the building to another.
Line 15:		Line 15:
	Ventilation systems may also include heating, cooling, filtration and humidity control.		Ventilation systems may also include heating, cooling, filtration and humidity control.

−	Ventilation has become increasingly important because of the tendency to ‘seal’ modern buildings. However the process of extracting air which may have been conditioned, and replacing it with air that has not is inherently wasteful.	+	Ventilation has become increasingly important because of the tendency to ‘seal’ modern buildings. However the process of extracting internal air, which may have been conditioned, and replacing it with air that has not is inherently wasteful.

−	This can be mitigated by heat recovery, the process of collecting and re-using heat that would otherwise be lost to reduce energy consumption, reducing running costs and carbon emissions.	+	This can be mitigated by heat recovery, the process of collecting and re-using heat that would otherwise be lost, which can help to reduce energy consumption, reducing running costs and carbon emissions.

−	Heat recovery ventilation (HRV or ventilation heat recovery (VHR) or ~~Mechanical Ventilation with Heat Recovery~~ (MVHR)) uses a heat exchanger to recover heat from extract air, that would otherwise be rejected to the outside, and uses it to pre-heat the ‘fresh’ supply air. Very efficient heat exchangers can recover as much as 98% of the ‘waste’ heat.	+	Heat recovery ventilation (HRV or ventilation heat recovery (VHR) or mechanical ventilation heat recovery (MVHR)) uses a heat exchanger to recover heat from extract air, that would otherwise be rejected to the outside, and uses this heat to pre-heat the ‘fresh’ supply air. Very efficient heat exchangers can recover as much as 98% of the ‘waste’ heat.

	Typically heat recovery ventilation works by transferring heat between the incoming and outgoing air streams by blowing them in opposite directions between adjacent flat plates in air-to-air heat exchangers. Heat is absorbed by the plates from the 'hot' air on one side and released to the 'cold' air on the other. Cellular heat exchangers, which can achieve greater efficiency, drive the incoming and outgoing heat through adjacent square tubes, increasing the heat transfer surface area.		Typically heat recovery ventilation works by transferring heat between the incoming and outgoing air streams by blowing them in opposite directions between adjacent flat plates in air-to-air heat exchangers. Heat is absorbed by the plates from the 'hot' air on one side and released to the 'cold' air on the other. Cellular heat exchangers, which can achieve greater efficiency, drive the incoming and outgoing heat through adjacent square tubes, increasing the heat transfer surface area.
Line 25:		Line 25:
	Air to ground and air to water heat exchangers use the earth or water as a heat exchange body by blowing air through tubes surrounded by earth or water.		Air to ground and air to water heat exchangers use the earth or water as a heat exchange body by blowing air through tubes surrounded by earth or water.

−	Heat can also be recovered from other processes and components, such as refrigeration units and chiller units, boilers, power generation plant, plant cooling systems, hot liquid effluents and high-temperature exhaust gasses. Recovered heat can also be used for drying processes, power generation, pre-heating combustion air for furnaces, boilers and so on.	+	Heat can also be recovered from other processes and components, such as refrigeration units and chiller units, boilers, power generation plant, plant cooling systems, hot liquid effluents and high-temperature exhaust gasses. Recovered heat can also be used for drying processes, power generation, pre-heating combustion air for furnaces or boilers and so on.

−	Heat recovery is also possible with heat pumps, which essentially reverse the refrigeration cycle of chiller units to ~~providing~~ heating, rather than cooling.	+	Heat recovery is also possible with heat pumps, which essentially reverse the refrigeration cycle of chiller units to provide heating, rather than cooling.

	It is also possible, although relatively complicated to include heat recovery in natural ventilation systems.		It is also possible, although relatively complicated to include heat recovery in natural ventilation systems.